Network Programming for Multiplayer Games - Game Coding Complete - page 676

bool Init();
void Shutdown();

int AddSocket(NetSocket *socket);
void RemoveSocket(NetSocket *socket);

bool Send(int sockId, shared_ptr<IPacket> packet);
void DoSelect(int pauseMicroSecs, int handleInput = 1);

void SetSubnet(unsigned int subnet, unsigned int subnetMask)
{

m_Subnet = subnet;
m_SubnetMask = subnetMask;

}
bool IsInternal(unsigned int ipaddr);

unsigned int GetHostByName(std::string hostName);
const char *GetHostByAddr(unsigned int ip);

void AddToOutbound(int rc) { m_Outbound += rc; }
void AddToInbound(int rc) { m_Inbound += rc; }

protected:
WSADATA m_WsaData; // describes sockets system implementation

typedef std::list<NetSocket *> SocketList;
typedef std::map<int, NetSocket *> SocketIdMap;

SocketList m_SockList; // a list of sockets

SocketIdMap m_SockMap; // a map from integer IDs to socket handles

int m_NextSocketId; // a ticker for the next socket ID

unsigned int m_Inbound; // statistics gathering - inbound data
unsigned int m_Outbound; // statistics gathering - outbound data
unsigned int m_MaxOpenSockets; // statistics gathering - max open sockets

unsigned int m_SubnetMask; // the subnet mask of the internal network
unsigned int m_Subnet; // the subnet of the internal network

NetSocket *FindSocket(int sockId);
};

One of the core features of the socket manager is the notion that each socket has a
companion identifier. In this implementation of the manager, a counter is used to
guarantee a unique ID for each socket in the system. This is different than a handle
because this ID could be something much more significant, such as a player ID